Mello, Filipe L. S. and Costa, LÃdia O. O. and HernÃ¡ndez, Eduardo PadrÃ³n and Farias, AndrÃ©a M. Duarte and Fraga, Marco A. (2010) Platinum-Vanadium Oxide Nanotube Hybrids. NANOSCALE RESEARCH LETTERS, 5 (6). pp. 1002-1009. ISSN 1931-7573 (Print) 1556-276X (Online)
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://www.springerlink.com/content/h81t221504538q...
The present contribution reports on the features of platinum-based systems supported on vanadium oxide nanotubes. The synthesis of nanotubes was carried out using a commercial vanadium pentoxide via hydrothermal route. The nanostructured hybrid materials were prepared by wet impregnation using two different platinum precursors. The formation of platinum nanoparticles was evaluated by applying distinct reduction procedures. All nanostructured samples were essentially analysed by X-ray diffraction and transmission electron microscopy. After reduction, transmission electron microscopy also made it possible to estimate particle size distribution and mean diameter calculations. It could be seen that all reduction procedures did not affect the nanostructure of the supports and that the formation of metallic nanoparticles is quite efficient with an indistinct distribution along the nanotubes. Nevertheless, the reduction procedure determined the diameter, dispersion and shape of the metallic particles. It could be concluded that the use of H2PtCl6 is more suitable and that the use of hydrogen as reducing agent leads to a nanomaterial with unagglomerated round-shaped metallic particles with mean size of 6 nm.
|Subjects:||Material Science > Functional and hybrid materials|
|Deposited By:||M T V|
|Deposited On:||03 Jun 2010 14:42|
|Last Modified:||03 Jun 2010 14:42|
Repository Staff Only: item control page